Modeling of Diesel Spray Impinging Behavior in Lubricating Oil Film

DOI DOI Web Site Web Site

Bibliographic Information

Other Title
  • 潤滑油膜に対するディーゼル噴霧衝突挙動のモデリング
  • 潤滑油膜に対するディーゼル噴霧衝突挙動のモデリング : 臨界ウェーバ数の計測
  • ジュンカツ ユマク ニ タイスル ディーゼル フンム ショウトツ キョドウ ノ モデリング : リンカイ ウェーバスウ ノ ケイソク
  • ―臨界ウェーバ数の計測―
  • -Measurement of Critical Weber Number-

Search this article

Abstract

Post-injection has been attracted attention as the Diesel Particulate filter regeneration method. However oil dilution that occurs when fuel spray impinges lubricating oil film on cylinder liner is an issue which cannot be ignored. Because oil dilution is leading to deterioration of sliding properties of piston and thermal efficiency, there is need to clarify spray impingement behavior on lubricating oil film. Therefore, in this research, we focus on the fuel dilution phenomenon by post injection and aim for modeling. Then, the critical weber number was measured to make it possible to judge whether or not the fuel droplet impinges on lubricating oil film splash or deposition. As a result, it was found that the fuel droplet impingement behavior on lubricating oil film is classified into three behaviors by two critical weber numbers. First, WcrP = (272 + 11600 δnon1.29)La0.01, second, WecrS = (211 + 2255 δnon1.05) La0.05, La = ρο σο din / μ ο2, Here, ρο is density of Lubricating Oil, σο is surface tension of Lubricating Oil, μο is viscosity coefficient of engine oil, and La is Laplace number.

Journal

Keywords

Details 詳細情報について

Report a problem

Back to top